kconfig: fix 'Save As' menu of xconfig

The 'Save As' menu of xconfig is not working; it always saves the
kernel configuration into the default file irrespective of the file
chosen in the dialog box.

The 'Save' menu always writes into the default file, but it would
make more sense to write into the file previously chosen by 'Load'
or 'Save As'.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/kconfig/qconf.cc

@@ -1392,6 +1392,8 @@ ConfigMainWindow::ConfigMainWindow(void)
 	conf_set_changed_callback(conf_changed);
 	// Set saveAction's initial state
 	conf_changed();
+	configname = xstrdup(conf_get_configname());
+
 	QAction *saveAsAction = new QAction("Save &As...", this);
 	  connect(saveAsAction, SIGNAL(triggered(bool)), SLOT(saveConfigAs()));
 	QAction *searchAction = new QAction("&Find", this);
@@ -1520,17 +1522,29 @@ ConfigMainWindow::ConfigMainWindow(void)
 
 void ConfigMainWindow::loadConfig(void)
 {
-	QString s = QFileDialog::getOpenFileName(this, "", conf_get_configname());
-	if (s.isNull())
+	QString str;
+	QByteArray ba;
+	const char *name;
+
+	str = QFileDialog::getOpenFileName(this, "", configname);
+	if (str.isNull())
 		return;
-	if (conf_read(QFile::encodeName(s)))
+
+	ba = str.toLocal8Bit();
+	name = ba.data();
+
+	if (conf_read(name))
 		QMessageBox::information(this, "qconf", "Unable to load configuration!");
+
+	free(configname);
+	configname = xstrdup(name);
+
 	ConfigView::updateListAll();
 }
 
 bool ConfigMainWindow::saveConfig(void)
 {
-	if (conf_write(NULL)) {
+	if (conf_write(configname)) {
 		QMessageBox::information(this, "qconf", "Unable to save configuration!");
 		return false;
 	}
@@ -1541,10 +1555,24 @@ bool ConfigMainWindow::saveConfig(void)
 
 void ConfigMainWindow::saveConfigAs(void)
 {
-	QString s = QFileDialog::getSaveFileName(this, "", conf_get_configname());
-	if (s.isNull())
+	QString str;
+	QByteArray ba;
+	const char *name;
+
+	str = QFileDialog::getSaveFileName(this, "", configname);
+	if (str.isNull())
 		return;
-	saveConfig();
+
+	ba = str.toLocal8Bit();
+	name = ba.data();
+
+	if (conf_write(name)) {
+		QMessageBox::information(this, "qconf", "Unable to save configuration!");
+	}
+	conf_write_autoconf(0);
+
+	free(configname);
+	configname = xstrdup(name);
 }
 
 void ConfigMainWindow::searchConfig(void)

scripts/kconfig/qconf.h

@@ -291,6 +291,7 @@ public slots:
 class ConfigMainWindow : public QMainWindow {
 	Q_OBJECT
 
+	char *configname;
 	static QAction *saveAction;
 	static void conf_changed(void);
 public: